Thermostatic control for the valve of a carbureter.



A. E. ENGLAND.

THERMOSTATIC CONTROL FOR THE VALVE OF A CARBURETER.

APPLICATION FILED AUG. 10, 1914.

Patented Aug. 10, 1915.

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ARTHUR E. ENGLAND, DETROIT, MICHIGAN. V

THERMOSTATIC CONTROL FOR THE VALVE A CARBURETER.

Specification of Letters Patent. Patented Aug. 10, 1915;

Application filed August 10, 1914. Serial No. 855,975.

To all whom it may concern Be it known that I, ARTHUR E. ENGLAND, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Thermostatic Control for the Valve of a Carbur'eter, and declare the This invention relates to a thermostatic control for the valve of a carbureter, especially the fuel valve, which is ordinarily the needle valve. In order to make the thermostat more sensitive to variations in weather conditions the aid of circulating water that cools the engine is called upon.

In the drawings, Figure l, is a view of my invention applied to a carburetor, some of the parts being partly sectioned. Fig. 2, is a view of the lower part of the thermostat, it being that part which is broken oil in Fig. 1.

The carbureter maybe a conventional form of carbureter with float chamber a, valve float 6, fuel nozzle 0, air intake (Z, needle valve e, auxiliary air intake f and throttlevalve g. The fuel passes through the passageway 72. from the float chamber to the nozzle, out of which it is drawn in a jet .by the aspirating eflect of the an from the intake (1, being drawn by the suction of the engine past the mouth of the nozzle. This is all standard construction and needs no further explanation.

The lower end-or stem of the needle valve e passes through a stufling box i which pre; vents the fluid from leaking through. The

stem terminates in a knurled head j with a projecting screw is. The clamp nut t ordinarily holds the needle valve in a fixed relation with respect to the tube Z so that the needle valve cannot be adjusted manually. As soon as the clamp nut is released by turning. the screw m, the needle valve may be adjusted with respect to the tube 1. This tube Z is part of the thermostat and is preferably a brass tube to give it a great sensibility to heat changes, that is to make it expand relatively great when'there is a change in temperature.

Rods n, n'are fixed to the carbureter by being screwed thereto and are preferably steel. The slide 0 is guided upon these rods. The slide 0 is provided with a clamping ring that encircles the tube Z and may be loosened or tightened by turning the screw-p. Further, the slide may be clamped to the rods at various points by the use of the screws 9, q. Inasmuch as the guide rods n, n are held in fixed relation with respect to the carbureter, except as they are susceptible to minute changes by reason of expansion and contraction, the relative position of the needle valve with respect to its valve seat may be altered by adjusting the slide 0.

The tube Z, by reason of being built of brass or a metal of equivalent expansibility, will expand relatively greater than the rods n, n, consequently during colder weather the needle valve will be automatically adjusted to deliver a greater amount of fuel while in warmer or hotter weather it will be adjusted to deliver a less amount of fuel. By reason of the adjustable connection between the needle valve and the thermostat tube the location of the range of automatic adjustability may be varied to suit different engine or fuel conditions. By sliding the slide 0 up or down upon the guide rods 1 and tube Z, the efiective length of the expanding member may be varied to vary the amount of contraction or expansion with a given thermal change.

The circulating water of the power unit is circulated through the thermostatic tube Z by two pipe connections 1' and s. This makes the thermostatic tube subject to two thermal changes: change in the atmosphere and change in the circulating water. The chief reason for employing the thermal changes in the circulating water to afl'ect the thermostatic tube is that when the engine has been standing a considerable time the temperature of the circulating water materially drops and in time will become that of the, atmosphere. The engine then becomes cold and requires a considerably richer mixture in starting than it does when running, consequently the use of the circulating water to effect the thermostatic tube makes provision for the automatic adjustment of the needle valve when the engine is cold and requires considerable fuel. It also, to some degree, aids the atmosphere in changing the adjustment of the needle valve to vary the atmospheric conditions, inasmuch as the cooling water is always some what cooler incold weather than it is in hot weather.

What I claim is:

1. The combination with a carbureter provided with a valve, of an expansible thermostatic member connected with the valve and fixable with respect to the carbureter at different points along its length to vary the effective length of the expansible member so as to vary the amount of expansion or contraction.

2. The combination with a carbureter provided with a valve, of a pair of steel rods fixed to the carbureter, a brass thermostatic member attached to the rods and also to the valve whereby greater expansion of the brass thermostatic member with respect to the steel rods alters the adjustment of the Valve.

3. The combination with a carbureter provided with a" valve, of a linear member of relatively low sensibility to heat changes, said member being attached to the carbureter, a thermostatic linear member of relatively high sensibility to heat changes, said latter member being attached to the firstmentioned linear member and also connected with the valve so that its expansion and con traction adjusts the valve.

4:. The combination with a carbureter provided with a valve, of a rod attached to the carbureter and paralleling the axis of the valve, said rod being of relatively low sensibility to thermal changes, a thermostatic linear member paralleling the rod and axis of the valve and of relatively great sensibility to thermal changes and a slide that can be clamped to the rod and to the thermostatic linear member to change the point of attachment of the thermostatic member and thereby vary the effective length of the expansible member so as to change the amount of contraction or expansion.

5. The combination with a carbureter provided with a valve, of a thermostatic tube for regulating the movement of the valve, means for holding the tube in a definite relation with respect to the carbureter and means for conveying the circulating water of the engine through the tube.

6. The combination with a carbureter provided with a valve, of a thermostatic member for regulating the movement of the valve, means for holding the thermostatic member in a definite relation with respect to the carbureter, and means for conveying the circulating water of the engine into thermally influential position with respect to the thermostatic member.

7. The combination with a carbureter provided with a valve having a stem, of a thermostatic member having a screw-threaded connection therewith, and a block for holding the two members in given positions of adjustment.

In testimony whereof, I sign this specification in the presence of two witnesses.

ARTHUR E. ENGLAND. Witnesses:

STUART C. BARNES, VIRGINIA C. SPRA'I'I. 

